CN105003080B - A kind of fan-shaped steel building construction technology - Google PatentsA kind of fan-shaped steel building construction technology Download PDF
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- CN105003080B CN105003080B CN201510225613.XA CN201510225613A CN105003080B CN 105003080 B CN105003080 B CN 105003080B CN 201510225613 A CN201510225613 A CN 201510225613A CN 105003080 B CN105003080 B CN 105003080B
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- 239000010959 steel Substances 0.000 title claims abstract description 244
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The present invention relates to technical field of building construction, specifically a kind of fan-shaped steel building construction technology.
It is well known that as National Highway develops, also level land emerges various buildings therewith.The variation of construction style is also marked Will the culture in a city or area and builds degree.But the current architectural construction technology of China can not also meet various many The construction demand of sampleization building.
It is especially complicated at some, in the building of non-common property structure, exist that construction speed is slow, construction safety degree not The problems such as high, construction quality can not meet requirement and high construction cost.
[content of the invention]
The purpose of the present invention is exactly to solve the deficiency that construction technology is short of in non-common property building in the prior art And defect, especially for fan-shaped steel building, it is desirable to provide a kind of construction technology is novel, safe and reliable, can effectively be lifted Construction speed and degree of safety and the fan-shaped steel building construction technology for reducing construction cost, including fan-shaped steel construction, it is described Fan-shaped steel construction includes roofing truss system, roofing moulding steel construction, floor truss, outrigger platform steel construction, hanging platform, portion Divide cross stiff steel reinforced column and V-type support column, it is characterised in that the construction technology comprises the following steps：
1) axis is divided along arc structure to fan-shaped steel construction, straightway is processed into by steel box-girder, be in broken line after splicing Approximate circular arc, and calculate every steel box-girder and rail midline length；
2) fall frame using installation at high altitude, pushing tow and jacking and roofing truss structure is installed：
A. roofing truss is segmented：According to the crane capacity of selected crane gear, the transport capacity of haulage vehicle and The internal force situation of roofing truss to roofing truss divide equally and is segmented, it is determined that the position of centre of gravity being each segmented and each segmentation of calculating Weight, while splicing to parts；
B. installation on ground is carried out to roofing truss and lifts loose mail with crawler crane；
C. roofing truss is lifted：Calculated and collected according to each segmentation center of gravity and weight, draw the maximum segmentation of weight, with reference to hanging The weight of dress instrument, the crawler crane of selection roofing truss lifting is simultaneously lifted to each segmentation, during lifting, according to steel construction Equipment and end reaction used during roof system pushing tow, incremental launching device attached rails use load-bearing girder steel under No. 43 tracks, track to adopt With steel box-girder, steel box-girder is shelved on the armored concrete capital of axle, and the connection between box beam is using the way of continuous beam, purlin Frame assembles overturn-preventing shelf, and the finally segmentation to roof sections is assembled；
D. the installation of roofing moulding steel construction and support member；
E. to track girder thrusting slip and fall frame, branch setting is carried out to thrustor and is installed, along two sides during pushing tow To axis moved around the center of circle into sector, be controlled by the way of constant angular velocity, fall frame using slim jack, and in original Reinforced beam increases shear reinforcement or increase Reinforced Concrete Corbels；
F. remaining segment is lifted；
3) floor truss is lifted, and is selected corresponding crawler crane according to floor truss weight and bracket truss weight and is carried out building Layer girder steel, the construction of tie-rod；
4) other are lifted, including overhanging steel structure construction and the lifting of V-type support column.
Also include building floor truss platform falsework system in described floor truss lifting, falsework system is unloaded During load, it is first determined sequence of unloading, unloading Support Position and remaining fulcrum are calculated before the unloading of next order is carried out every time Counter-force, each stage support force of lattice column and slide piston shoes end reaction must in the bearing capacity scope of working measure, Support frame is made according to support column construction stage maximum support power, and forcing checking is carried out to support frame, is initially set up during checking computations Computation model, then computing unit stress, finally calculate each rod member checking computations ratio.
In step 2) in-a, after to roofing truss divide equally and being segmented, then parts are pressed to each segmentation and steel construction is special Levy and split.
In step 2) control mode of pushing tow is in-e：
1) truss roofing pushing tow is moved along two axles around the center of circle into sector, and the thrustor on two axles need to be with isogonism speed The mode of degree controls two axles, and different pushing tow linear velocities are set according to the radian of two axles difference；
2) pushing tow control system is constituted closed-loop control system with PLC, displacement transducer and frequency converter, and PLC is with different frequencies The electronic pump motor rotation of modulus control two, feeds back shift value, PLC is to two axial lines by the displacement transducer on oil cylinder On velocity of displacement ratio and desired value be compared and continuous finishing frequency converter setpoint frequency, make the speed difference on both sides close to Theoretical value；
3) synchronization of the thrustor on same axis with the control of magnetic valve break-make each other, with same axis first On the basis of the thrustor displacement transducer that platform is installed, the shift value on same axis is compared PLC, and constantly corrects electricity The make-and-break time of magnet valve, makes front and rear thrustor keep synchronous, and control pushing tow speed is within 0.3m/ minutes, to ensure safety, Graduated scale, and regular check between centers scale are set on sliding rail, it is ensured that the correctness of computer control.
The fan-shaped steel building construction technology, in addition to the segmentation of cross stiff steel reinforced column, cross stiff steel reinforced column are divided to two Section, first first paragraph cross stiff steel reinforced column are lifted, and are then set up operating platform, then are carried out second section cross stiff steel reinforced column and hang Dress, is finally welded, is polished, is painted.
The flow of thrusting slip is：
1) mounting slip steel box-girder and track；
2) roof system support position installs piston shoes；
3) in piston shoes over-assemble roof system；
4) hydraulic top pushing device is installed, by roof system pushing tow to design attitude；
5) jack is installed；
6) incremental launching device and piston shoes are removed；
7) sliding box beam and track are removed；
8) formal sliding support is installed and backing plate is set；
9) loose jack, makes roof system decline and be supported on billet；
10) jack jacking, makes roof system depart from billet, and reduce backing plate height；
11) loose jack, makes roof system decline and be supported on billet；
10) and the 11) step 12) the is repeated, until roof system is in place on design sliding support.
Outrigger platform Construction of Steel Structure comprises the following steps：
1) using crane lifting layer outrigger platform, wherein for the layer platform for encorbelmenting larger near expansion joint position, existing Need first to set progress crane before temporary support, lifting to be applicable strength checking before boom member, installation in underface；
2) steel pipe frame column temporary support is set below girder steel and suspension rod connecting node, and drawing sets four cable wind ropes progress It is fixed；
3) progress crane before hoisting steel beam, lifting is carried out using crane and is applicable strength checking；
4) suspension rod and strut and stainless reinforcing pull rod between V-type post are installed；
5) after the outrigger platform structure installation in an area, temporary support is removed.
V-type support column includes suspension column, interlude and top end, and suspension column is possessing installation separately as an installation unit Constructed, interlude is divided into two sections and marched into the arena, lifted at ground spliced latter whole after condition, top end is welded on when processing On the node of truss bottom, lifted during construction with trussmember.
Fan-shaped steel building construction technology, in addition to Steel Structure Installation correction, step are as follows：
1) steel column installs correction
A. according to the nut on the good screw rod of bottom Pass line adjustment of steel column, cushion block is placed, all steel column suspension centres are arranged at The top of steel column, by the use of four interim connection otic placodes as suspension centre, when steel column is lifted by crane must while hooking up, while pivoted arm make steel column vertical It is straight liftoff, when steel column hangs top 200mm in place, slowly fall after shutting down stabilization, alignment bolt hole and cross hairs, should in whereabouts Avoid foundation bolt screw thread of colliding with；
B. after heel slab enters foundation bolt, the alignment case of the side center line of steel column four and basic cross axis is checked, After the deviation in place of adjusted steel column is in 3mm, then the steel column that falls, it is allowed to practicable, after steel column lifting is in place, is first directed at steel column Center line and base center line, determine the plan-position of steel column, then adjust to correct steel column by the nut under steel column bottom plate Linearity, it is desirable in a free state, then the linearity offset correction of two orthogonal directions tightens lower margin spiral shell to steel column to zero Minor variations may occur for bolt, the absolute altitude of steel column, the requirement no more than 2.0mm；
C. perpendicularity is corrected, and the perpendicularity correction of steel column is using two theodolites, in the orthogonal both direction of shaft Upper erection theodolite is erected at deviation angle and is not more than in the range of 15 °, and the installation at steel column capital is sighted with telescope Mark, downwards sights telescope the installation mark at post bottom, and places Steel Ruler in post bottom installation mark, is seen in telescope Examine capital and the distance for installing mark after mark is projected with post bottom is installed, adjust steel column, the perpendicularity of steel column is corrected to rule Determine in scope, perpendicularity deviation value should be not more than H/1000 and≤10mm, H are pillar height；
D. correction is reversed, by the way that setting-out goes out on the steel column capital that a section has been fixed by the orientation axis of two steel columns Afterwards, the deviation of two each face of section steel column and orientation axis can be measured, can be in the hope of steel column in X and Y side using the deviation Upward torsion value, is then accurately adjusted, or combines total station survey steel column capital coordinate to correct, and makes steel column capital Tag line is installed to adjust to orientation axis；
2) roofing truss installs correction：Roof truss truss adjuster between one truss is often segmented, perpendicularity correction is carried out, Gu Determine at the bearing of two ends, bolt is fixed or welding → installation roof girder → horizontal support → inspection is errorless, as model room, with such Push away, the colligation point of roof truss truss is set, it is necessary to which colligation produces flexural deformation to prevent component on node at suspension centre.
The present invention compared with the existing technology, the advantage is that the steady of construction technology effective guarantee of the invention construction speed The rational and orderly of fixed quick and working procedure, it is ensured that the realization of constructing aims.Combined and applied by a series of scientific algorithm simultaneously Work actual conditions Discrete control, scientific management and advanced technology are combined, and will be accelerated engineering department's progress and are ensured construction peace simultaneously Quan Xing.
[brief description of the drawings]
Fig. 1 is fan-shaped steel construction axis and region division schematic diagram in embodiments of the invention；
Fig. 2 is the center section plan of fan-shaped steel construction in embodiments of the invention；
Fig. 3 is that V-type support column and the above in the embodiment of the present invention is encorbelmented part roof system installation procedure schematic diagram；
Fig. 4 is the temporary support floor plan in the embodiment of the present invention；
Fig. 5 is the lattice support column way schematic diagram in the embodiment of the present invention；
Fig. 6 is the column braces structural representation in the embodiment of the present invention；
Fig. 7 is the roofing truss segmental structure schematic diagram in the embodiment of the present invention；
Fig. 8 is lattice support column facade layout drawing when segmentation 4 in the embodiment of the present invention is lifted；
Fig. 9 is the rail system sectional drawing in the embodiment of the present invention；
Figure 10 is to fall frame measure schematic diagram in the embodiment of the present invention；
Figure 11 be in the embodiment of the present invention on the basis of original beam arrangement of reinforcement plus shearing resistance bent-up bar structure chart；
Figure 12 is to increase the method schematic diagram of bracket in the embodiment of the present invention on the basis of original beam arrangement of reinforcement；
Figure 13 be rail in the embodiment of the present invention center line laying when setting-out be fitted to arc radius identical with D, E axle When schematic diagram；
Figure 14 is the schematic layout pattern of thrustor in the embodiment of the present invention；
Figure 15 is moderate angles pushing tow control flow chart of the embodiment of the present invention；
Figure 16 is roofing lifting locating rack schematic diagram in the embodiment of the present invention；
Figure 17 is locating rack support facade arrangement schematic diagram in the embodiment of the present invention；
Figure 18 is the plan-position axial line control point schematic diagram of built-in fitting in the embodiment of the present invention；
Figure 19 is the plan-position center line control point schematic diagram of built-in fitting in the embodiment of the present invention；
Figure 20 is high-strength bolt installation procedure figure in the embodiment of the present invention；
Figure 21 is steel column correction schematic diagram in the embodiment of the present invention；
As illustrated, in figure：1. the flooring of 2. 3. roofing truss system of roofing moulding steel construction of reinforced concrete structure 4. The cross stiffened column 10. of 8. box column of the reinforced concrete structure 6. of truss 5. hanging platform 7.V types support column 9. is encorbelmented flat The truss lower edge 15. of 13. track girder of platform 11. steel pipe, the 12. piston shoes 14. stacking design shearing resistance steel of bearing 17. of billet 16. Muscle or the room of 22. stopping means of Reinforced Concrete Corbels 18. jack, 19. bracket, 20. track centre, 21. steel box-girder center line 23. The lower margin spiral shell of face 28. steel column of lifting locating rack 24. built-in fitting center line, 25. upper cover plate, 26. lower cover, 27. adjusting nut 29. The concrete foundation of 30. adjusting nut absolute altitude of bolt 31.；
It is the Figure of abstract of the present invention to specify Fig. 1.
The invention will be further described below in conjunction with the accompanying drawings, for the structure and principle of this device people professional to this It is very clear.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to limit this Invention.
The structure of embodiment enumerates a sector structure, is classified as A, B, C, D, E, F, G axle and A, B, C, D, E, F, G area, A Wheelbase circle center distance 444.200m, B axle is away from circle center distance 435.200m, C wheelbase circle center distance 425.200m, D wheelbase distance of center circle From 416.200m, E wheelbase circle center distance 335.200m, F wheelbase circle center distance 321.700m, G wheelbase circle center distances 304.700m； 118.18 degree of 1 line to 85 bank degree, is divided into 7 areas, and 1 line to 13 lines is A areas, and 13 lines to 25 lines are B areas, and 25 lines to 37 lines are C Area, 37 lines to 49 lines are D areas, and 49 lines to 61 lines are E areas, and 61 lines to 73 lines are F areas, and 73 lines to 85 lines are G areas, and each area's radian is equal For 16.88 degree.Each bank degree of 1 line to 2 lines, the line of 3 line ... 85 is 1.41 degree, as shown in Figure 1.
Flooring part uses steel pipe column+steel truss structure, and steel pipe column net is 27m × 81m, and truss two ends are supported on before flooring On the concrete component at rear portion, truss support uses single-directional sliding support with concrete, and floor is used with two ends concrete respectively It is affixed.D is truss Steel Structure to the line of E axles 1~85, and each exhibition section sets 14 GGZ1 box columns, totally 98, in each exhibition section Studding is away from bis- kinds of specifications of 18.0m, two end 17.137m and 21.143m, and bracket is connected between post and post, truss and D axles, bracket, E Axle is connected, and then forms truss space structure, and truss is connected with truss, divides connection of winding up to be connected with lower edge, after the beam that winds up connection It is flooring to lay metallic combination floor plates.It is 31.5m, 81m continuous two across steel truss that roofing large span steel truss, which uses span, Structure, truss front support is on V-arrangement post, and middle and rear end is supported on adjacent reinforced concrete bodies, wherein at the front portion of flooring Outer choose chooses about 19m outside at about 20m, the rear portion of flooring, roof truss total length is 161.0m；Truss is along radial direction in radioactivity point Cloth, wherein in the heart away from about 9m, the center section plan of fan-shaped steel construction is as shown in Figure 2.
The main Construction Plan of the embodiment is as follows：
1. interim measure scheme of constructing
1.1 scaffold operating platforms
Set up material：A48.3*3.6 scaffolding steel pipes, various fastener, bamboo string piece scaffold board, close mesh safety net etc..Platform Bearing capacity limit value：The equipment laydown area such as electric welding machine bearing capacity presses 2KN/m on platform2Control, personnel's standing construction area, platform is held Carry power and press 1.5KN/m2Control.
The operating platform detailing requiments that operating platform is set up are：A. table top scaffold board is completely spread；B. support body horizontal cross The vertical interval of support is no more than 8m；C. vertical bridging overall height is completely located at surrounding；D. bottom of upright rod set the elongated channel-section steels of 10# or 6mm it is thick, 100*100mm steel plate backing plates；E. support body bottom is at least 100mm thickness C15 bed courses, and basic unit's soil needs compacting；F. support body bottom need to be done Good drainage works.
1.2 lattice temporary supports
Temporary support floor plan is as shown in figure 4, by the progress end reaction calculating of MIDAS softwares, be computed lattice Formula temporary support maximum jacking force is 62 tons.Lattice support column includes GGZ1, GGZ2, GGZ3 and GGZ4.During arrangement, GGZ4 peaces Holding position is on the post-cast strip of reinforced concrete floor, need to be coordinated with design and civil engineering unit, suitably be adjusted post-cast strip Position.The installation site of GGZ1~3 is located on two layers of steel truss, GGZ4 support column bottom only armoured concrete slab load-bearing.Therefore Armoured concrete slab needs consolidation process below GGZ4 support columns.Treating method is：Plate bottom sets steel pipe support, and support is seated in ground On face.Lattice support column way is as shown in figure 5, column braces structural representation is as shown in Figure 6.During lattice support unloading, lead to Cross MIDAS softwares to calculate the unloading Support Position of each step and the remaining reaction of supports, it is ensured that each stage branch of lattice column Support force and the end reaction of sliding piston shoes are in the bearing capacity scope of working measure.
Lattice support column way when 1.3 segmentations 4 are lifted
As shown in fig. 7, roofing truss is divided into 4 segment structures, wherein segmentation 4 needs lattice support column, lattice support when lifting Post facade layout drawing is 19.7 tons to the maximum as shown in figure 8, lattice support column support force calculates support force through MIDAS softwares. Support frame sequence of unloading checks step：(1) intermediate supports lattice column is removed；(2) V-type post is installed；(3) second lattice is removed Support column；(4) the 3rd lattice column is finally removed, and continues that follow-up Cantilevered Roof is installed.It can obtain, the support column construction stage is maximum Support force need to be based on 25.6 tons.Then forcing checking is carried out by software, including：Set up computation model, it is computing unit stress, each Rod member checking computations ratio.
1.4 installation on ground moulding beds
The installation on ground of segmentation 1~4 requires that ground clearance is not less than 800mm, the requirement of surface irregularity degree with moulding bed top surface 2mm/3m, overall irregularity degree are less than 30mm.Horizontal primary-secondary beam junction is all provided with base.
1.5 thrusting slip track girder systems
Rail system sectional drawing is as shown in figure 9, space is adopted between track girder bottom wing listrium and shear wall, 1000*1500 beams With the high-strength mortar joint filling for being not less than C35, to ensure that upper load is delivered on shear wall and beam.
1.6 roof systems fall frame bearing
Fall frame measure schematic diagram as shown in Figure 10, shear reinforcement or increase Reinforced Concrete Corbels are increased in raw steel reinforced concrete. When original reinforced concrete structure is reinforced, it is divided into when beam column is respectively positioned on center line with beam not in two kinds of situations of post center line.Work as beam column When being respectively positioned on center line, on the basis of original beam arrangement of reinforcement, increase shearing resistance bent-up bar (HRB400), as shown in figure 11.Work as beam column Not in post center line, using the method for increase bracket, as shown in figure 12, bracket uses Central Southern China Electric Power Design Institute in the present embodiment TD-107-01 atlas in numbering N50-70 110A way, vertical bearing capacity standard value is 146.5 tons, and design load is 199.1 tons, meet the engineering use requirement in the present embodiment.
2. incremental launching construction
2.1 steel box-girder bearings and laying
It is in sector structure that the structural steelwork of the present embodiment, which is one, due to the difficulty of processing of actual bearer steel box-girder, D axles With E axle arc radius larger (being respectively 416.2 meters and 335.2 meters), all steel box-girders are processed into straightway, in folding after splicing The approximate circular arc of line.P43 rails are laid thereon, and camber line is fitted to by measurement, bending processing.The length of straightway presses every Pin Spacing determine.By the 16.88 ° of calculating of a 13 Pin segment angle of exhibition section, every steel box-girder of D axles and rail midline length are：And every box beam of E axles and track centre length are：Do 0.7 ° of the convenient splicing of corner cut in the two ends of every steel box-girder. 2mm stainless steel plates are laid on gap joint ＜ 2mm, the slide surface of steel box-girder, are polished smooth after the welding of stitching portion, piston shoes cross piece Place " will not be gnawed ".
2.2 steel rail layings and overlap joint
P43 rails are fixed on steel box-girder using intermittent weld mode and are aided with pressing plate, at box beam two ends each pre-buried one Shear-pin is cut, rail machining gap is to agree with the shear-pin.Due in slipping, rail bear it is opposite with glide direction, About 100 tons of jacking force, the reliability of support reaction system is improved with the combination of weld seam, pressing plate and shear-pin.Rail Center line laying when setting-out be fitted to D axles, E axle identical arc radius, as shown in figure 13, data are described as follows table in figure It is shown：
Overlap need to carry out polishing finishing, it is ensured that arc transition, meet piston shoes and pass through clearance requirement during piece.Steel case Just completed when the laying of beam is prior to erection truss, and because the whole construction period time may be longer.So steel box beam erection And, it is necessary to do antirust to slide surface and track clamping face, prevent pounding protection after steel rail laying.
2.3 piston shoes are set and construction
Piston shoes are divided into two kinds：Piston shoes without thrustor and the piston shoes with thrustor.Every during construction Truss structure is first placed on the node location of D axles and E axles before setting up, as shown in figure 14, and figure intermediate cam is represented without thrustor Piston shoes, round dot represent the piston shoes with thrustor.
The layout of thrustor has mainly been done considered below：The weight of known G axles to E between centers is 1160 tons, E axles to D axles Between weight be 1810 tons, E axles to the weight between A axles be 570 tons, G areas gross weight be 3540 tons, other several exhibition section rooms The weight of face trussing is identical with this.According to the calculation of opposite swpporting force, end reaction of the whole G areas roof truss on D axles is 1190 It is 2349 tons on ton, E axles, is calculated by 10% coefficient of friction, total jacking force that D axles need is 119 tons, and total jacking force of E axles is 235 tons.Because D axles and E axles use the thrustor of identical quantity and specification, and the jacking force that E axles need is larger, so distribution Mode is to meet based on E axle pushing tows.Whole roof truss totally 13 Pin, often increases its top for being needed on E axles of a Pin (truss containing contact) Thrust is about 18 tons.Consider certain nargin, the Pin numbers of first thrustor pushing tow are 4 Pin, add second thrustor Afterwards, several 8 Pin of the Pin of pushing tow.So thrustor is arranged on the Pin of the 2nd, the 5th and the 9th node location.
Because track centre is fitted to the circular arc with D axles and E axle same radius, pushing tow process can consider piston shoes with thereon Truss structure between be not present and rotate, need to only consider that the elongation that truss is produced by the temperature difference changes.According to calculating, in 30 DEG C of temperature In the case of difference, D axles to the elongation between E axles are about 5cm.Fixed during construction at the top of the slipping-shoe device of E axles with truss, D axles Longitudinal spacing is done at the top of slip base, laying steel round pin makes truss can be in transverse extension.Because pushing tow process is same with truss construction Shi Jinhang, so thrustor is installed in place successively in truss construction.In view of possible unfavorable factor, pumping plant, pushing tow dress Put and done certain safeguard procedures.During construction also must great care take other measures if necessary with prevent above hydraulic pressure fill Put and pipeline damage.After the Pin of the 2nd, the 5th and the 9th is in place, thrustor is installed on track.Rail clamping device is placed into rail On, pipe bending cylinder rod end earrings is connected with piston shoes afterbody earrings by bearing pin.Because track is in the arc-shaped, pushing tow process oil cylinder with Angle between piston shoes can produce change, so rod end earrings installs oscillating bearing, can be rotated in the range of 5 °.In view of top Pushing device needs to lift repeatedly when mounting and dismounting, to prevent the displacement transducer being arranged on outside oil cylinder from damaging, there is provided anti-roll Dynamic flange.It is turn processed on the inconvenience for preventing rail clamping device excessive sag from bringing, otic placode when oil cylinder is together with rail clamping device integral lifting Dynamic limit angle.The clamping length of wedge is 650mm in rail clamping device, and calculating gripping section action by the less E axles of circular arc is：
By increasing fixture block tooth form Highly, the integral rigidity of reduction fixture block reaches fits with track clamping face.
, it is necessary to which building a workbench places hydraulic power unit on truss structure by thrustor.Pumping plant is installed in place Afterwards, the installation of hydraulic line, signal wire etc. could be carried out.Due to thrustor mounting distance farther out, hydraulic system using point Cloth structure.I.e. hydraulic power unit is only used as pressure source output, and the control of oil cylinder pushing tow and auxiliary rail clamping device ram control valve are all nearby On thrustor, to improve the response speed of system.Hydraulic hose is first coupled to first pushing tow by tandem On device.After being installed Deng second thrustor, hydraulic line is being concatenated into second from first thrustor, with this Analogize.Signal wire and automatically controlled circuit on thrustor are then connected to pumping plant electronic box by cable concentrator.Pumping plant is to thrustor Length of pipeline is fixed, and ties up fixation after pipe installation between truss.Needed repeatedly when being mounted and dismounted in view of hydraulic power unit Lifting, installs to prevent electronic box and pipe joint from damaging, at the top of pumping plant and prevents pounding grid, protection is still should be noted during construction operation.
According to motor specification, inlet wire cable section must use more than 16 squares.G areas roof from workbench position to Installation site is, it is necessary to turn over 67.52 °, 394.8 meters of the arc length of E axles movement, and 490.2 meters of the arc length of D axles movement must Similar removal cable reel car connection power supply box must be used to be powered for pumping plant.Electronic box configures 63A air switches on car.Pumping plant pipeline After connection is finished, it is connected by FROFIBUS communication bus with Synchronization Control case.From security standpoint, master control box is positioned over ground On the dolly in face, by manual hand.Pumping plant, the operation conditions of thrustor are obtained by the screen in master control box.
2.5 angularly pushing tow controls
Truss roofing pushing tow is moved with D axles along E axles around the center of circle into sector, and the thrustor on D axles and E axles need to be with The mode of constant angular velocity is controlled.The arc radius of D axles and E axles is respectively 416.2 meters and 335.2 meters, the pushing tow linear velocity ratio of E axles D axles slow 19.46%.Pushing tow control system constitutes closed-loop control system with PLC, displacement transducer and frequency converter.PLC is with different Frequency values control two electronic pump motor rotations, feed back shift value by the displacement transducer on oil cylinder, PLC is to two axles Velocity of displacement ratio on line is compared with desired value 19.46% and constantly repairs frequency converter setpoint frequency, makes the speed on both sides Degree differential is bordering on theoretical value.Synchronization of the thrustor with the control of magnetic valve break-make each other on same axis.With same axle On the basis of the thrustor displacement transducer that First is installed on line, the shift value on same axis is compared PLC, not The make-and-break time of disconnected amendment magnetic valve, makes front and rear thrustor keep synchronous, control flow chart is as shown in figure 15.
3. floor Steel Structure Installation
Floor Steel Structure Installation is divided into three parts：Part I is Floor steel structure；Part II is F axles to G axles Outrigger platform and V-type support；Part III is the steel-frame structure on the outside of 85 axles.
3.1 Floor steel structures are installed
Floor steel structure construction is main by bracket truss lifting elements, truss lifting elements and wind up girder steel and lower edge tie-rod Constitute.Each area bracket truss is divided into 12 Pin lifting elements altogether, and truss is divided into 43 Pin lifting elements.Flooring lifting elements 381 hang altogether.Box column maximum lifting weight 25t, truss lifting elements truss maximum length is 28.334m, is highly 3.7m, Bracket truss lifting elements maximum lifting weight is 48.7t.The whole Pin of bracket truss lifting elements most weights are 48.7 tons, length 18 Rice, is directly assembled into finished product in processing factory and transports in-site installation.Truss lifting elements length is at 22 meters to 30 meters, in processing factory It is divided into two sections after preassembling and is sent to scene, maximum length is 17 meters, weight 19t.Scene carries out docking spelling using 150 tons of crawler cranes Dress and lifting.Floor truss is lifted：150t crawler cranes select 27m principal arms, lifting radius 16m, specified elevating capacity 47.3t ＞ 46.7t, meets lifting requirements；150 tons of truck cranes select 25m principal arms, lifting radius 7m, specified elevating capacity 47.2t ＞ 46.7t, meets lifting requirements.When flooring bracket truss is lifted, 150 tons of crawler cranes select 27m principal arms, lift radius 14m, lifting Weight 55.6t ＞ 48.6t, meet lifting requirements；150 tons of truck cranes select 25m principal arms, lift radius 6m, specified elevating capacity 51.7t>48.6t, meets lifting requirements.Steel pipe column lifting is lifted using the hoisting balance beam specially designed, suffers from one's own actions balance. Floor girder steel, tie-rod are installed from 25t truck cranes, most heavy member section H300x300x10x15, weight 1.2t.GT- 250C truck cranes selection selection 32.2m principal arms, lift radius 22m, lift weight 1.6t ＞ 1.2t, meet and require.
The operating platform of docking location uses hanging basket, and hanging basket is made using round steel, and girder steel is arranged on before steel beam lifting On, lifted with component to installation site.When component is in place, bolt eyelet clamping is first penetrated into installation bolt with punch, pacified Filling bolt quantity must not be less than 1/3rd of bolt sum, and must not be less than 2.Girder or steel truss are before lifting, Ying Lifeline is set on top flange, and lifeline is usedGalvanized steel wire rope, steel wire rope two ends are fixed on post, small vertical Detachable Boards wall is used below post.The time required to saving lifting lifting and falling, installation efficiency to be improved, using a hook The method hung more installs the small members such as secondary beam, to ensure safety, and corner is carried out to steel wire rope and shaped steel flange plate contact position Protection.
3.2, which encorbelment and hang steel construction and V-type support column, installs
Overhanging steel structure includes outrigger platform and hanging platform two parts.Element type be mainly cantilever steel girder and suspension rod, Stainless reinforcing pull rod.Part is most reconstructed for girder steel GL4, specification HN550*200*10*16,11.85 meters of length, weight is 1.1t.
After the layer Steel Structure installation of relevant position, start that overhanging steel structure is installed, installation method is as follows：
The first step：Outrigger platform is lifted using 25t truck cranes, encorbelment larger for being encorbelmented near expansion joint position is flat Platform, exist needs first to set temporary support in underface before boom member, installation；
Second step：Steel pipe frame column temporary support is set below girder steel and suspension rod connecting node, and drawing sets four guys Rope is fixed.25t truck cranes are selected when temporary support is lifted, 32.2m principal arms lift radius 9m, lift weight 5.5t, meet It is required that；
3rd step：Hoisting steel beam is carried out using 25t cranes.25t truck cranes, 32.2m principal arms, lifting are selected during steel beam lifting Radius 14m, lifts weight 3.5t ＞ 1.1t, meets and requires；
4th step：Suspension rod and strut and stainless reinforcing pull rod between V-type support column are installed；
5th step：After the outrigger platform structure installation in one area, temporary support is removed.
V-type support column mainly includes suspension column, interlude and capital section, wherein suspension column separately as an installation unit, Possess and constructed after mounting condition.Interlude is divided into two sections and is transported to scene, and ground spliced latter whole is lifted.Capital section It is welded on the node of truss bottom, is together lifted with trussmember during construction during processing.V-type support column is main to be distributed along G axis. Each subregion is main to be made up of 6 specifications for Φ 750*30 tubular pillar group.Every length is about 25 meters, lifting components maximum weight Measure as 14.9t.When V-type support column is lifted, 50t truck cranes selection 25.3m principal arms lift radius 8m, lifting weight 15.9t ＞ 14.9t, meets and requires.
4. layer Steel Structure is lifted
The segmentation and assembly of 4.1 roofing truss
This engineering roofing truss presses A~G exhibition sections, and 7 assembled sliding elements are divided into altogether, due to roofing truss section compared with Greatly, scene mainly should be sent in loose mail form after processing factory carries out overall preassembling.First in installation on ground into 3 sections of planes Unit, moulding bed enterprising line slip unit in high-altitude is then lifted into 260t crawler cranes and is always spelled.After assembled good flat unit, two are utilized Platform crawler crane four-point lifting is stood up to being disposed vertically state.Then lifted using 260 tons of suspension centres of crawler crane 2.
260 tons of crawler crane long 29m of tower principal arm, auxiliary long 27m, radius of clean-up 20m, 53.3 tons of hoisting weight.Roofing purlin Frame is segmented 1 maximum segment and weighs 52.2 tons of 53.3 tons of ＜, meets and requires.Roofing truss is segmented 2 maximum segments and most weighs 49.2 tons of ＜ 53.3 tons, meet and require.Roofing truss is segmented 3 maximum segments and most weighs 44.8 tons of 53.3 tons of ＜, meets and requires.Roofing truss is segmented 4 maximum segments most weigh 14.2 tons of 53.3 tons of ＜, meet and require.Crawler belt is reduced close proximity to installation position in the assembled place of segmentation 1~4 Hang walking with load distance.Take stabilizing measures as shown in Figure 16, Figure 17 during the group pair of roofing truss high-altitude, locating rack is placed on reinforcing bar On three layers of roofing of concrete structure, D and E be disbursed from the cost and expenses at be respectively provided with one group.
Before truss is assembled, arrangement and connection to moulding bed are checked.Assembled moulding bed spacing is unsuitable excessive, to ensure truss There are enough strong points during assembly, it is to avoid truss influences splicing accuracy because of deformation induced by gravity；Moulding bed lower ground is necessary Simultaneously roadbed paving case or H profile steel are used as integral assembling platform for smooth compacting.Relative position between chord member is adjusted by jack, made It meets the requirement of related specifications.When truss is assembled, line style carries out rod member positioning after the arch camber provided according to design.Assembly is finished Comprehensive dimensional gaughing should be carried out before welding afterwards, deviation exceedes code requirement and should re-start adjustment if finding, checks again for nothing It can be welded after by mistake.Because truss sections carry out assembly, after truss assembly terminates, appearance and size inspection should be carried out, with true The assembled control errors of main couple are protected in allowed band, it is ensured that follow-up high-altitude is installed docking and is smoothed out, and reduction is installed accumulation and missed Difference.
4.2 roofing moulding Steel Structure Installations
6.8 tons of roofing moulding assembly maximum weight.According to 7030 type tower crane performance parameter tables, radius of turn R=35m When, 6.91 tons of lifting capacity；260 tons of crawler cranes principal arm 29m, auxiliary 27m, radius of clean-up 20m, 53.3 tons of lift heavy；Therefore loop wheel machine is full Foot is required.Roofing moulding into after assembly, then passes through 2 7030 type tower cranes and 260 tons of crawler cranes are lifted using installation on ground.Room The smallclothes such as face vertical trusses, inter-tie, support, piece weight is small, main to be lifted using live 2 7030 type tower cranes. Outside for the covering of tower crane elevating capacity, lifted using 260 tons of crawler cranes.
5. steel-structure installation measurement scheme
5.1 control measurements
While the place horizontal control network and vertical control network that repetition measurement is transferred, it is necessary to which repetition measurement is associated with steel construction Civil engineering structure correlation, to ensure the globality of final Construction of Steel Structure, only after all repetition measurement precision, which are met, to be required, Lower step work can be carried out.To meet Steel Structure Installation positioning needs, building need to be consolidated using periphery and builds plane net, selection control Should be selected during system point it is stable not by construction infection outside the venue, while considering easy to use and intervisibility problem from now on.Control net Palpus accurate surveying rigorous adjustment rear can be used.Net observation pier is controlled to use forced centering form, to reduce centering error.Plane Net is controlled to use the consistent control system provided with surveying and mapping unit.Select reasonable and reliable Technology Precision and compile Practicable e measurement technology scheme is made, emphasis is to the setting of benchmark control net, the selection of measuring instrument, point layout, data The measurement process such as transmission and multisystem check is controlled.
In elevation control aspect, vertical control point should be located at not to be influenceed outside the venue by condition of construction.Examined with precision level Survey Severed head elevation control network.Vertical control point is introduced in field with the mode of closure level, and sets fixing point as elevational point. In ground elevation point through check it is errorless after, pilot measurement is distinguished when museum construct on every aspect, each aspect pilot measurement 4-6 is individual Pilot measurement is answered to firm component in absolute altitude control point, control point, pilot measurement point is checked on each layer, error should be in required precision In the range of.It can be used spirit level with leveling line pilot measurement during elevation pilot measurement, elevation transmits to hang steel ruler or total powerstation zenith side Check to direct transmission and mutually.
In the selection on measurement opportunity, the corresponding absolute altitude and other deformation values of each construction section provided, one are designed As be that, based on the design load under certain standard temperature, and large scale structure is often across season, across round-the-clock job.Temperature change, especially The change for being Sunshine Temperature Difference Effect is complicated for the influence of malformation, and the malformation caused by difference variation is become from actual measurement Separated in shape value extremely difficult.Therefore, the selection temperature change that should try one's best small opportunity measures, and makes every effort to temperature, day Min. is reduced to according to the influence to Construction control.The test that some large scale structure temperature influence is shown, in weather conditions Worst summer, the temperature of morning before sunrise is more uniform, and closest to seasonal average temperature, the relatively inning of measurement.Mesh Before, the influence that temperature is controlled large scale structure is difficult accurately to describe.
In the Construction control of large scale structure, temperature influence can be divided into two kinds：A kind of is the influence of day and night temperature, another Kind is the influence of Seasonal Temperature Difference.Either day and night temperature or Seasonal Temperature Difference have considerable influence to the control of truss absolute altitude.Round the clock The influence of the temperature difference is general more using the way avoided in absolute altitude control, i.e., the working procedure of control action is played to absolute altitude, is intended to Ask and carried out before the more uniform morning sunrise of temperature.But the weather condition of continuous high temperature is met, because the temperature in morning is still difficult uniform, The influence of temperature is difficult to avoid completely, in the case, preferably uses the correction formula of absolute altitude to reduce the influence of Sunshine Temperature Difference Effect.Season The influence of the temperature difference is saved, a normal temperature should be set, influence of the actual Seasonal Temperature Difference to structure in work progress is controlled in construction System considers in calculating.
Influence of 5.2 welding to measurement control
To reduce welding to measurement control and the influence of Construction of Steel Structure quality, correction is installed every time and finished, high intensity spiral shell After bolt installation, survey crew's reply verticality of steel column re-starts measurement there is provided to the actual amount of deflection, then by matter Amount department works out welding sequence by actual numerical value, and welding contracted quantity is reserved to some positions.In welding process, survey crew is carried out Tracking observation, to reduce influence of the welding to measurement control.
The measurement control of 5.3 Steel Structure Installations
The plan-position control figure of built-in fitting is as shown in Figure 18, Figure 19, and TK1, TK2, TK3, TK4 represent built-in fitting in figure Axial line control point, YK1, YK2, YK3 represent built-in fitting center line control point.
Axis location method：On the basis of I, II grades of control points, make every effort to improve oxygen evolution rate, using accurate span and longitude and latitude The survey time of instrument angle measurement two, setting-out goes out the axis in length and breadth and anchor point TK1, TK2, TK3, TK4 of built-in fitting.In TK1, TK3 anchor point frame If theodolite, respectively with anchor point TK2, TK4 orientation, the center line of built-in fitting is set to be overlapped with control axis, and with total powerstation to point Position carries out coordinate repetition measurement.
Total station instrument coordinate positioning mode：Structure center line according to each built-in fitting on design drawing determines YK1, YK2, YK3 Position, obtains its coordinate value, and YK1, YK2, YK3 mark are made on built-in fitting.YK1 is positioned with total powerstation polar coordinates normal Point, determines the point midway of built-in fitting, then determines YK2, YK3 position with same method, controls the axis direction of built-in fitting.
Both the above positioning mode surveys the built-in fitting axis deviant permissible value set as 2.0mm.
In the absolute altitude control of built-in fitting, high process controls of the to base surface, using the conventional vertical survey of spirit level, is directly surveyed Obtain the absolute altitude in built-in fitting face；Survey from level datum points farther out is set, in order to reduce the transmission error and multiple reading of spirit level Accidental error, the absolute altitude of built-in fitting is measured using Trigonometric Leveling by Total Station.The absolute altitude tolerance of built-in fitting is 3.0mm.
In the measurement control of steel column, axis location or perpendicularity are intended to measurement, for straight steel column two for both oblique steel columns Person selects one, can typically survey perpendicularity.When steel column is adjusted, first coarse adjustment axial location or perpendicularity are answered, then preliminary survey and adjustment absolute altitude, Then accurate adjustment axial location or perpendicularity, last repetition measurement absolute altitude again.
In the measurement control of girder steel, it is either large or small that steel girder erection may have gap so that bolt can not be penetrated normally, And this deviation punch can not be adjusted in place.Jack top can be used to open or reduce gap, so that bolt can be penetrated normally. Levelness tolerance (L/1000)+3mm (L is beam length) of girder steel, and no more than 10mm, the exceeded main original of girder steel levelness Because being connection Board position or screwhole position error again, can taking replacing connecting plate or plug welding hole, drilling is handled again.
The measurement control of truss is as follows：
(1) installation on ground measurement control
1) it is assembled by the order at two lateral centers by from bottom to top when steel truss is assembled；
2) it should form stable overall when truss is assembled as early as possible.During truss is assembled, the same day component of assembly will be formed Stability Analysis of Structures system；
3) assembly of truss is finished, and is now twisted and is welded after high-strength bolt.To be winded up during welding after first lower edge.
4) monitors the deformation of truss using high-precision measuring instrument, with pre- arch camber after welding before especially welding Change, note abnormalities should search in time reason and take measures adjustment.
5) will measure whole observation during welding, it is ensured that its deviation is within the scope of code requirement.
(2) installation at high altitude measurement control
1) adjusts moulding bed absolute altitude and position according to design drawing, when assembled, the perpendicularity and axial location of adjustment member, and Take measures, prevent the deformation in installation and welding process.
2) after assembly is finished, each node of truss is carried out using total powerstation to check adjustment, after the completion of, start truss welding. After the completion of welding, complete detection is carried out to truss, detection data record is achieved, and is compareed with the detection data before welding point Analysis, determines its deformation extent, analyzes Deformation Reasons, to reduce assembled error as far as possible in next truss is assembled.
6. high-strength bolt is installed
As shown in figure 20, high strength exploitation length is defined below for high-strength bolt installation procedure figure：L=δ+H+nh In+c, formula：The gross thickness mm of δ-connecting elements；H-height of nut mm, takes 0.8D (diameter of bolt)；N-number of pads；H- Gasket thickness mm；C-screw rod exposed parts length mm (2-3 buttons are advisable, and typically take 5mm)；Taken after calculating 5 integral multiple.
High-strength bolt is connected to that reply auxiliary connection is in kind before construction and rubbing surface is tested and rechecked, it is qualified after can just enter Enter installation.Bolt is installed point 3 steps and carried out：The first step, lifts steel member, is fixed, forbidden with bolt or punch Used using high-strength bolt as bolt, bolt quantity should not be less than the 1/3 of bolt sum and no less than two；Second Step, replaces plain bolt, and just twist high-strength bolt with high-strength bolt from centre to surrounding；3rd step, high-strength bolt fastening is necessary Carry out in two times, for the first time just to twist, just tighten and be affixed to the 50~80% of bolt end stubborn axle power value.Second is to twist eventually, eventually Tighten and be affixed to classical power, deviation is not more than ± 10%.Carry out twisting eventually using special electric wrench under normal circumstances, plum blossom Head, which is twisted off, indicates knot beam eventually.When can not be operated with special spanner individually, torque-shear type high-strength bolt should be by big hexagonal head height Strength bolt is constructed with calibrated wrench method.Eventually after knot beam, check that leakage is twisted, owes to twist and preferably strike inspection one by one with the hand hammer of 0.3~0.5kg weights, such as It was found that have owe twist, leakage twist should mend it is stubborn；It is super stubborn to change.Nut should be retracted 30 °~50 ° during inspection, then be screwed onto original position, determined eventually Screwing torque value, its deviation cannot be greater than ± 10%, screw up making a mark for lattice eventually, in order to avoid obscure.High-strength bolt should when installing Removing does not allow to exist that steel are Texturized and the phenomenon such as depression on the dirts such as iron filings, floating rust on rubbing surface, rubbing surface.Install When should be noted that whether connecting plate is brought into close contact, to the contact surface gap caused by steel plate thickness deviation or fabrication error, according to the form below Method is handled：
7. Steel Structure Installation corrective action
7.1 steel columns install corrective action
According to the nut on the good screw rod of the bottom Pass line adjustment of steel column, cushion block is placed.All steel column suspension centres are arranged at steel The top of post, suspension centre is used as by the use of four interim connection otic placodes.Steel column when lifting by crane must while hooking up, while pivoted arm make steel column vertically from Ground.When steel column hangs top 200mm in place, slowly fall after shutting down stabilization, alignment bolt hole and cross hairs, should be avoided in whereabouts Collide with foundation bolt screw thread.After heel slab enters foundation bolt, pair of the side center line of steel column four and basic cross axis is checked Agree to do a favour condition, after the deviation in place of adjusted steel column is in 3mm, then the steel column that falls, it is allowed to practicable.
After steel column lifting is in place, steel column center line and base center line are first directed at, the plan-position of steel column is determined, then Adjust to correct the linearity of steel column by nut under steel column bottom plate, it is desirable to steel column in a free state, two orthogonal directions Linearity offset correction to zero, then tighten foundation bolt.Minor variations may occur for the absolute altitude of steel column, under normal circumstances Not over《Code for acceptance of construction quality of steel structures》(GB50205-2001) 2.0mm of defined requirement, steel column school Positive schematic diagram is as shown in figure 21.
Perpendicularity is corrected：The perpendicularity correction of steel column is using two theodolites, in the orthogonal both direction of shaft Theodolite is set up, or is erected at deviation angle and is not more than in the range of 15 °, the installation mark at steel column capital is sighted with telescope Know, telescope is sighted downwards the installation mark at post bottom, and Steel Ruler is placed in post bottom installation mark, observed in telescope The distance for installing mark after mark is projected with post bottom is installed in capital, adjusts steel column, the perpendicularity of steel column is corrected to regulation In the range of, perpendicularity deviation value should be not more than H/1000 and≤10mm, H are pillar height.
Reverse correction：After by the orientation axis of two steel columns, setting-out goes out on the steel column capital that a section has been fixed, The deviation of two each face of section steel column and orientation axis can be measured.Can be in the hope of steel column on X and Y-direction using the deviation Torsion value, then accurately adjusted.In addition, according to the practice of construction situation at scene, total station survey steel can also be combined Post capital coordinate is corrected, and the installation tag line of steel column capital is adjusted to orientation axis.
7.2 roofing truss install corrective action
Roof truss truss adjuster between one truss is often segmented, is carried out at perpendicularity correction, fixed two ends bearing, bolt is solid Fixed or welding → installation roof girder → horizontal support → inspection is errorless, as model room, by that analogy.The colligation point of roof truss truss Set, it is necessary to which colligation produces flexural deformation to prevent component on node at suspension centre.
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Inventor after: Jiang Haixi
Inventor after: Tan Xiang
Inventor after: Zhang Wei
Inventor after: Chen Xuefang
Inventor after: Ye Shaoming
Inventor after: Shi Renhua
Inventor after: Li Zongbiao
Inventor after: Jin Qianhua
Inventor after: Huang Bing
Inventor after: Zhou Jinfa
Inventor before: Zhang Wei
Inventor before: Chen Xuefang
Inventor before: Ye Shaoming
Inventor before: Shi Renhua
Inventor before: Li Zongbiao
Inventor before: Jin Qianhua
Inventor before: Huang Bing
Inventor before: Zhou Jinfa
Inventor before: Tan Xiang
|CB03||Change of inventor or designer information|